EndOfHeatTimeCalculator

gistfile1.cs

public class EndOfHeatTimeCalculator : IEndOfHeatTimeCalculator
    {
        readonly ILastTappedHeatFetcher _lastTappedHeatFetcher;

        public EndOfHeatTimeCalculator(ILastTappedHeatFetcher lastTappedHeatFetcher)
        {
            _lastTappedHeatFetcher = lastTappedHeatFetcher;
        }

        #region IEndOfHeatTimeCalculator Members

        public DateTime Calculate(DateTime startingFrom)
        {
            TappedHeat lastTappedHeat = _lastTappedHeatFetcher.Fetch();
            TimeSpan timeToCompleteLastTappedHeat = lastTappedHeat.EndDate - lastTappedHeat.StartDate;
            DateTime predictedEndOfHeat = startingFrom.Add(timeToCompleteLastTappedHeat);
            return predictedEndOfHeat;
        }

        #endregion
    }